Does it spark joy? If not, let it go.
It's easy to mock this instruction from the adorable and slightly insane master of tidiness, Marie Kondo, but I contend that it is an invitation to a radical revolution. Master Kondo advises us not to engage with a thing in the usual way. Don't read the book or try on the clothing; hold it to your heart and notice what you feel.
"Pay close attention to how your body responds when you do this. When something sparks joy, you should feel a little thrill, as if the cells in your body are slowly rising. When you hold something that doesn't bring you joy, however, you will notice that your body feels heavier."
Attention to rising cells is revolutionary; it changes everything.